Grasshopper spacecraft makes record hop

SpaceX’s reusable Grasshopper spacecraft has managed to hop more than 24 stories into the air, hover and then land safely.

Tsunamis can be much bigger than thought

'Focusing points' off certain coasts can create tsunamis much higher than previously believed possible.

Nepal plans new measurement of Mount Everest

Nepal's to carry out its own calculation of the height of Mount Everest, aiming to settle a long-running disagreement with China.